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T3, Total

Test Code: 859

CPT Code(s): 84480

Methodology: Immunoassay (IA)

Clinical Significance: Total T3 measurements are used to diagnose and monitor treatment of hyperthyroidism and are essential for recognizing T3 toxicosis.

Additional names: Triiodothyronine

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QuestAssureD 25-Hydroxy and 1,25-Dihydroxyvitamin D, LC/MS/MS

Test Code: 16761

CPT Code(s): 82306, 82652

Includes: 92888 QuestAssureD™ 25-Hydroxyvitamin D (D2, D3), LC/MS/MS and 16558 Vitamin D, 1,25-Dihydroxy, LC/MS/MS

Methodology: Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

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T4 Free, Direct Dialysis

Test Code: 35167

CPT Code(s): 84439

Methodology: Direct Equilibrium Dialysis Radioimmunoassay (RAI)
Laboratory Developed Test (LDT) - This was developed and its analytical performance characteristics have been deteremined by Quest Diagnostics Nichols Institute, Chantilly, VA. It has not been cleared or approved by the FSA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

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ANA Screen, IFA, Reflex Titer/Pattern, and Reflex to Multiplex 11 Ab Cascade

Test Code: 16814

CPT Code(s): 86038

Methodology: Immunofluorescent Assay (IFA)

Clinical Significance: Antinuclear antibodies are associated with rheumatic diseases including Systemic Lupus Erythematous (SLE), mixed connective tissue disease, Sjogren's syndrome, scleroderma, polymyositis, CREST syndrome, and neurologic SLE.

Includes: The ANA Screen, IFA, Reflex Titer/Pattern, and Reflex to Multiplex 11 Ab Cascade begins with an ANA Screen, IFA.

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Glucose, Plasma

Test Code: 484

CPT Code(s): 82947

Methodology: Spectrophotometry (SP)

Clinical Significance:Plasma glucose levels may be abnormally high (hyperglycemia) or abnormally low (hypoglycemia). Glucose measurements are used in the diagnosis and treatment of carbohydrate metabolic disorders including diabetes mellitus, idiopathic hypoglycemia, and pancreatic islet cell neoplasm.

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Test Code: 223

CPT Code(s): 82040

Methodology: Spectrophotometry (SP)

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Rheumatoid Factor

Test Code: 4418

CPT Code(s): 86431

Methodology: Immunoturbidimetry

Clinical Significance: Elevated RF is found in collagen vascular diseases such as SLE, rheumatoid arthritis, scleroderma, Sjögren's Syndrome, and in other conditions such as leprosy, tuberculosis, syphilis, malignancy, thyroid disease and in a significant percentage of otherwise normal elderly patients.

Alternative Name(s): RF

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Test Code: 606

CPT Code(s): 83690

Methodology: Spectrophotometry (SP)

Clinical Significance: Confirmatory evidence for diagnosis of pancreatitis.

Alternative Name(s): Pancreatic lipase; LIP; Lipase, serum

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Hepatic Function Panel

Test Code: 10256

CPT Code(s): 80076

Includes: Total Protein, Albumin, Globulin (calculated), Albumin/Globulin Ratio (calculated), Total Bilirubin, Direct Bilirubin, Indirect Bilirubin (calculated), Alkaline Phosphatase, AST, ALT

Methodology: See individual tests

Clinical Significance: See individual tests

Alternative Name(s): Basic liver profile; LFT; Liver Function Profile

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Test Code: 745

CPT Code(s): 84144

Methodology: Immunoassay

Clinical Significance: Levels increase sharply during the luteal phase of the menstrual cycle. The level increases from 9 to 32 weeks of pregnancy.

Alternative Name(s): N/A